Quatech RS-485 user manual Specifications

9 Specifications

Bus interface:		PCI, 32-bit bus, Universal Signalling Voltage
		IBM-compatible computers
Dimensions:		approx. 4.725" x 3.5"
Serial ports
Controller:		16550 with 16-byte FIFOs
Interface:			Two female D-9 connectors
Transceivers:		MAX-3076E or compatible
Differential output:			2V min. with 50-ohm load (RS-422)
			1.5V min. with 27-ohm load (RS-485)
Output rise/fall time:			15ns max.
Differential input
threshold:			-0.2V min., -0.05V max.
Input resistance:			96k ohm min..
Input current:			-100 microAmps min., +125 microAmps.
Power requirements
+5	volts:	approx. 250 mA
Temperature:		operating 0° to 70°
		storage -50° to 80°
Humidity:			10% to 90%

Quatech DSC-200/300 User's Manual 40